if you want to only execute certain tests you can find the binary in */OntoWiki/vendor/bin/phpunit , if you don’t have the vendor folder you need to run
make install or php composer.phar install. How to run only certain tests (and write them) can be read in the phpunit Documentation

Driven OntoWiki developers write every time tests for their new fancy stuff so this output can be changed in the future! But there should be _no_ errors by PHPUnit.

Curiosities

Percent symbol

If phpunit stop testing and breaks with an % like

PHPUnit 3.4.5 by Sebastian Bergmann.
..........%

in your tested code contains an exit call, which is reached (and the % indicates that your terminal complains about a missing newline). Use return; instead!